软磁铁氧体材料的喷雾造粒

本文叙述了喷雾干燥器的工作原理以及软磁铁氧体喷雾造粒用喷咀系统选择的原则,根据作者的工作实践,论述了软磁铁氧体喷雾造粒原料液的制备,喷雾造粒颗粒参数的控制、调整以及洲试方法.一些数据来自引进设备生产线,对从事软磁铁氧体生产的工厂及工程技术人员有一定的参考意义.     

八十年代软磁铁氧体的进展

前言第四次及第五次国际铁氧体会议(ICF-4,ICF-5)分别于1984及1989在美国旧金山及印度孟买召开。两次会议上宣读论文约360余篇,并出版论文专集。本文是根据论文集中有关软磁铁氧体文章的内容,介绍八十年代软磁铁氧体在科研,生产技术等方面取得的新成就。一、现代电子工业对软磁铁氧体产品的要求现代电子工业的生产已经进入自动化装配,自动化调试阶段。因此,对铁氧体产品也提出了更多,更高的要求,即: 1.批量大,价格低。每批定货的数量     

现代软磁铁氧体材料的合理选用

本文介绍了现代软磁铁氧体材料的部分主要用途及各种用途所需要的特殊材料性能，提供了合理选用国内外四家主要厂商材料牌号和磁芯形状的参考资料。     

抗EMI用软磁铁氧体

本文介绍了用软磁铁氧体抑制电磁波干扰（ＥＭＩ）的基本原理，抗ＥＭＩ用软磁铁氧体的特性，抗ＥＭＩ用软磁铁氧体元、器件及其应用的有关问题．     

软磁铁氧体生产,应用和市场预测

从软磁铁氧体生产，应用情况出发，对国内外软磁铁氧体市场需求情况作了分析，预测了今后的发展。     

永磁、软磁铁氧体的历史进程

概述了国内外永磁、软磁铁氧体进展，分析了国内外差距。     

软磁铁氧体材料直流叠加特性的研究

对ＭｎＺｎ铁体产直流叠加特性进行了产为系统的研究,直流叠加对材料特性,如磁导率、品质因数（Ｑ值）以及功耗等有显著影响。从理论上探讨了影响这些特性的因素,并提出了改善材料的直流叠加的特性的措施。     

磁性元件与铁氧体材料国际标准现状与发展动态

简述了磁性元件与铁氧体材料的国际标准与国外先进国家标准状况能主标准发展动态。     

Space charge characterization for the 21th century

Various methods of characterizing insulating materials by their ability to take up charge, retain it, and release it, are reviewed critically in search of measurable quantities that could be used to predict material behavior under stress up to failure conditions. Space charge characterization data on different types of materials from polymers to inorganic single crystals and ceramics are surveyed. The charging behavior is found to be influenced by many details such as surface condition and residual stresses. The traditional approach of linking dielectric breakdown to an intrinsic critical field for the material is tested against the newly emerging view that breakdown could be linked to space charge trapping at defect sites and to the attendant energetics of the mechanically strained lattice. The characterization process thus requires more care than was previously thought necessary, but after more research should become more predictive     

微波铁氧体器件现状及新一代集成化微波铁氧体器件展望

阐述了微波铁氧体器件发展现状,指出了微波铁氧体器件当前应该发展的技术方向和亟需突破的关键技术,强调微波铁氧体器件小型化和便于IC集成要求迫在眉睫。为实现微波铁氧体器件的小型化,从微波铁氧体器件基本原理入手,论述了圆极化概念在微波铁氧体器件功能实现和性能优化方面的重要作用,提出了采用绝缘多导体磁性结构实现可满足小型化和便于集成化要求的新一代微波铁氧体器件的基本思路。绝缘多导体磁性器件结构可实现多个TEM波模式的混合传输,利用此构造关于磁化偏置方向的正负圆极化波,从而产生显著的非互易传输和电控特性。TEM模式没有低频截止问题,器件尺寸可大体不受波长比拟规则的限制,通过目前日趋成熟的磁性集成化工艺,可实现小型化和便于IC集成化的新一代微波铁氧体器件。     

微波铁氧体器件失效情况的统计与分析

通过对我所2000~2003年交货检验产品批次性不合格情况的统计,对多晶微波铁氧体器件失效情况进行了分析,由此得出多晶微波铁氧体器件的失效模式及失效率,对多晶微波铁氧体器件的研制、生产、管理具有指导作用。     

铁的氧化物和铁氧体磁性材料

叙述了铁的氧化物在铁氧体磁性材料中所起的作用，针对我国Fe2O3(俗称铁红）资源短缺情况，如何适应磁性材料发展需求，介绍了几种可替代Fe2O3的其他铁的氧化物在生产中应用的情况。并对几种工业化生产F e2O3的方法做一简介，如何在今后的Fe2O3生产中提供质化，价格适中并且能稳定地供货提出个人的看法。     

新型微波铁氧体器件的开发和应用

叙述了南京电子技术研究所研制开发的一些新型的微波铁氧体组件或复合件及其应用前景。     

Engineers in the 21st century

Most of us choose engineering as a profession because we like to solve problems and build things. I picture an engineer as a whole person, a well-rounded, well-adjusted individual who is capable of conducting business like anyone else, with the added benefit of technical skills. We are the modern-day renaissance men and women, like Edison and Da Vinci. These men could invent and create. They were artists who had a broad view of the world and saw possibilities that no one had seen before. There is no reason why we can't be like them and do even more. We understand more science and have modern tools like computers and lasers to design and build things, plus we can use information technology to gather data when we have knowledge gaps. The point is that, once we have a clear picture of who we want to be, now more than ever before, that vision is obtainable, and that vision becomes a self-fulfilling prophesy if we choose to act on it. Certainly, if we think we can't do it, we won't. I'd like to share my vision of an accomplished 21st century engineer and offer some thoughts on how to get there. I see successful engineers as people who take an early interest in science and engineering. They have alert minds and a natural curiosity for everything around them. Their drive to learn is insatiable, soaking up knowledge constantly. They do things for the love of it, not simply for monetary rewards, but for the pride and personal satisfaction that comes with doing something particularly well     

超高B_s系列锰锌铁氧体材料的研制

采用传统陶瓷工艺及通过调整主配方,成功研制出了二峰温度从25℃至140℃的一系列超高饱和磁通密度Mn-Zn铁氧体材料。结果显示,因为锰锌铁氧体材料的饱和磁通密度Bs取决于主配方以及致密度,超富铁主配方是获得超高Bs锰锌铁氧体材料的必要条件;在超富铁主配方中,增加Fe2O3含量或Zn O含量都会使二峰温度升高,与常规配方是完全相反的变化规律;二峰温度越高,最低损耗值越高、高温Bs越高、起始磁导率越低、相对密度越低。     

软磁铁氧体磁芯形状与尺寸标准

１软磁铁氧体磁芯形状软磁铁氧体是软磁铁氧体材料和软磁铁氧体磁芯的总称。软磁铁氧体磁芯是用软磁铁氧体材料制成的元件或零件,或是由软磁铁氧体材料根据不同形式组成的磁路。磁芯的形状基本上由成型（形）模具决定,而成型（形）模具又根据磁芯的形状进行设计与制造。...